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在有杆泵抽油过程中，因油管弹性伸缩，抽油泵冲程损失达10％以上。在对油管柱进行受力分析后，计算了其伸缩量，并提出用封隔器、机械式油管张力锚和液压式油管锚锚定油管柱，控制油管柱伸缩。这样不仅可以减少冲程损失，提高泵效3％－15％，而且还能改善抽油泵的受力状况，延长泵免修期以及抽油杆和油管的使用寿命。比较3种控制油管伸缩工具，以液压式油管钱控制油管柱伸缩效果最好，操作方便，价格低廉，应大力推广应用。
In the rod pump pumping process, due to the flexible tubing stretch, pump stroke loss of 10% or more. After analyzing the stress of the tubing string, the expansion and contraction of the tubing string are calculated. It is also proposed to use the packer, the mechanical tubing tension anchor and the hydraulic tubing anchor to anchor the tubing string to control the tubing string expansion and contraction. This will not only reduce stroke loss and improve pump efficiency by 3% -15%, but also improve the stress on the pump and prolong the service life of the pump and the tubing. Comparison of three kinds of control telescopic tools tubing to hydraulic tubing to control the tubing string telescopic effect of the best, easy to operate, low prices, should be vigorously promote the application.